NET EARNINGS PER SHARE (Details) - USD ($) $ / shares in Units, shares in Millions, $ in Millions	3 Months Ended		6 Months Ended
	Mar. 29, 2019	Mar. 30, 2018	Mar. 29, 2019	Mar. 30, 2018
Earnings Per Share [Abstract]
Net earnings attributable to Varex	$ 5.8	$ 12.2	$ 8.8	$ 23.6
Weighted average common shares outstanding, basic (in shares)	38.2	37.8	38.1	37.8
Dilutive effect of potential common shares (in shares)	0.3	0.6	0.3	0.5
Weighted average common shares outstanding, diluted (in shares)	38.5	38.4	38.4	38.3
Earnings per share, basic (in USD per share)	$ 0.15	$ 0.32	$ 0.23	$ 0.62
Earnings per share, diluted (in USD per share)	$ 0.15	$ 0.32	$ 0.23	$ 0.62
Anti-dilutive employee shared based awards, excluded (in shares)	2.0	0.1	2.2	1.0